Having to turn, cut, groove, drill and re-thread these fittings is a real PITA and takes lots of time. I've tried to think of a better solution but haven't been able to think of anything more suitable/easy to use. If anyone has any suggestions maybe there's something I haven't thought of and I'd be all ears if anyone can think of something better? The pipe (tapered thread) fittings I use work great but they require a lot of work and modification to make them seal with the o-ring. A straight thread would be much easier if there is a similar product at a reasonable price with straight threads rather than tapered. IIRC the brass nipples I use cost me around $7 each and the female pvc around $1 each.